Add constants for local disk status

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

lib/constants.py

@@ -205,6 +205,12 @@ MODIFIABLE_STORAGE_FIELDS = {
   ST_LVM_PV: frozenset([SF_ALLOCATABLE]),
   }
 
+# Local disk status
+# Note: Code depends on LDS_OKAY < LDS_UNKNOWN < LDS_FAULTY
+(LDS_OKAY,
+ LDS_UNKNOWN,
+ LDS_FAULTY) = range(1, 4)
+
 # disk template types
 DT_DISKLESS = "diskless"
 DT_PLAIN = "plain"

test/ganeti.constants_unittest.py

@@ -54,6 +54,10 @@ class TestConstants(unittest.TestCase):
                     (constants.CONFIG_MAJOR, constants.CONFIG_MINOR,
                      constants.CONFIG_REVISION))
 
+  def testDiskStatus(self):
+    self.failUnless(constants.LDS_OKAY < constants.LDS_UNKNOWN)
+    self.failUnless(constants.LDS_UNKNOWN < constants.LDS_FAULTY)
+
 
 class TestParameterNames(unittest.TestCase):
   """HV/BE parameter tests"""
@@ -69,5 +73,6 @@ class TestParameterNames(unittest.TestCase):
                         "The %s parameter '%s' contains invalid characters" %
                         (kind, key))
 
+
 if __name__ == '__main__':
   unittest.main()